Agenda - 06-27-1983 - Laserfiche WebLink

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---------,-- MEMORANDUM TO: Board Members FROM: County Manager DATE: June 27, 1983 RE: Alternatves for Solving the Efland Elementary School and Efland Estates Sewer Problems (Revised following the 6t23/83 meeting with the Orange County School BOard and Town of Hillsborough) Work 'had:progressed through May to airang 6 financing for Efland Estates sewer relief when it was learned that the package treatment plant of the Efland Elementary School was malfunctioning to the point'it would need to be replaced. Since both the subdivision and school are contiguous to one another jt seemed beneficial to try to solve the problems through a joint project. The f011oWing outlines how this might be accomplished in so far as cost of on-site treatment. Size and Location Combined flow from the subdivision and school would be 22,600 gallons per day (GPD) which is within the County (20,000 GPO) and School (10,000 GPD) discharge permits, were they combined, (16,400 GPD) of this is attributable to the 26 houses, 7,200 to the 18 Ilots and 5,000 GPD to the School. Alternative 1, Collection and On-Site Treatment Through a County Package Plant Cost Estimatedlexpenditure would vary as to the scope of the project. Shown below are five configurations. A plant on site to treat the combined flow would need to be located to the north of the subdivision and school on one to two acres of land. 'Gravity would enable waste water to flow to the plant without pumping. Repair Existing 26 Houses Plant Plus 16 26 Houses for School 26 Houses Undeveloped 18 Lots, 26 Houses, —Alone Alone 'Lots Plus School Plus School On Site Collection 88,126 93,120 93,120 88,120 System Outfall to the 0 0 0 15,000 15,000 Treatment Plant Treatment Plant 35,500 48,000 84,000 57,000 Engineering 13,500 13,500 13,500 13,500 Contingencies 10,000 10,000 10,000 10,000